From mboxrd@z Thu Jan 1 00:00:00 1970 From: u.kleine-koenig@pengutronix.de (Uwe =?iso-8859-1?Q?Kleine-K=F6nig?=) Date: Wed, 13 Apr 2016 13:16:46 +0200 Subject: [PATCH v2 0/6] serial: imx: handshaking fixes and improvments In-Reply-To: <20160413091336.GH26941@ibawizard.net> References: <1458825865-7434-1-git-send-email-u.kleine-koenig@pengutronix.de> <20160411160128.GD26941@ibawizard.net> <20160412074622.GQ10108@pengutronix.de> <20160412094846.GF26941@ibawizard.net> <20160412105856.GR10108@pengutronix.de> <20160412121759.GG26941@ibawizard.net> <20160412173032.GS10108@pengutronix.de> <20160413091336.GH26941@ibawizard.net> Message-ID: <20160413111646.GC10108@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Wed, Apr 13, 2016 at 11:13:36AM +0200, Petr ?tetiar wrote: > Uwe Kleine-K?nig [2016-04-12 19:30:32]: > > > On Tue, Apr 12, 2016 at 02:17:59PM +0200, Petr ?tetiar wrote: > > > Uwe Kleine-K?nig [2016-04-12 12:58:56]: > > > > > > > ok, so UFCR_DCEDTE is set and UCR3_DSR controls the DTR output as > > > > intended. What is connected to the respective pin? > > > > MX6QDL_PAD_EIM_D25__UART1_DSR_B I think is the one. > > > > > > It's routed out to Apalis SoM pin 120, which is then connected via 22R > > > resistor and through SN65C3243DBR RS-232 line driver to header which I use as > > > debug/serial console. > > > > Then I guess the problem is that the rs232-partner asserts the imx6's > > DSR in reply to the imx6 asserting DTR? > > Yes, that's correct. OK, that fits nicely in my picture. So we only have to wait until Greg happily picks up the fixes (i.e. patches 1 up to 4). Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-K?nig | Industrial Linux Solutions | http://www.pengutronix.de/ |